Commit e0be7c86 authored Aug 15, 2013 by Shuah Khan Committed by Joerg Roedel Sep 24, 2013

iommu: Change iommu driver to call map trace event

Change iommu driver to call map trace event. This iommu_map_unmap class event
can be enabled to trigger when iommu map iommu ops is called. Trace information
includes iova, physical address (map event only), and size.

Testing:
Added trace calls to iommu_prepare_identity_map() for testing some of the
conditions that are hard to trigger. Here is the trace from the testing:

swapper/0-1 [003] .... 1.854102: map: IOMMU: iova=0x00000000cb800000 paddr=0x00000000cf9fffff size=0x400

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>

parent 69980630

drivers/iommu/iommu.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -842,6 +842,8 @@ int iommu_map(struct iommu_domain *domain, unsigned long iova,
	/* unroll mapping in case something went wrong */		/* unroll mapping in case something went wrong */
	if (ret)		if (ret)
	iommu_unmap(domain, orig_iova, orig_size - size);		iommu_unmap(domain, orig_iova, orig_size - size);
			else
			trace_map(iova, paddr, size);

	return ret;		return ret;
	}		}

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